Corrective

The error message is displayed when the Linux Small Computer System Interface (SCSI) mid-

Action:

layer asks for physical disk cache settings. The controller firmware manages the virtual disk

 

cache settings on a per controller and a per virtual disk basis, so the firmware does not

 

respond to this command. The Linux SCSI mid-layer assumes that the virtual disk's cache

 

policy is Write-Through. SDB is the device node for a virtual disk. This value changes for each

 

virtual disk.

 

See the topic Write-Back And Write-Through for more information about Write-Throughcache.

 

Except for this message, there is no effect of this behavior on normal operation. The cache

 

policy of the virtual disk and the I/O throughput are not affected by this message. The cache

 

policy settings for the PERC SAS RAID system remain unchanged.

Driver Does Not Auto-Build Into New Kernel

Issue:

Driver does not auto-build into new kernel after customer updates.

Corrective

This error is a generic problem for Dynamic Kernel Module Support (DKMS) and applies to all

Action:

DKMS-enabled driver packages. This issue occurs when you perform the following steps:

 

1.

Install a DKMS-enabled driver package.

 

2.

Run up2date or a similar tool to upgrade the kernel to the latest version.

 

3.

Reboot to the new kernel.

The driver running in the new kernel is the native driver of the new kernel. The driver package you installed previously in the new kernel does not take effect in the new kernel:

1.Type: dkms build –m <module_name> –v <module version> –k <kernel version>.

2.Type: dkms install –m <module_name> –v <module version> –k <kernel version>.

3.Type the following to check whether the driver is successfully installed in the new kernel: DKMS. The following details appear:

<driver name>, <driver version>, <new kernel version>: installed

Unable To Register SCSI Device Error Message

Error:

smartd[smartd[2338] Device: /dev/sda, Bad IEC (SMART) mode

 

page, err=-5, skip device smartd[2338] Unable to register SCSI

 

device /dev/sda at line 1 of file /etc/smartd.conf.

Corrective

This is a known issue. An unsupported command is entered through the user application. User

Action:

applications attempt to direct Command Descriptor Blocks to RAID volumes. The error

 

message does not affect the feature functionality. The Mode Sense/Select command is

 

supported by firmware on the controller. However, the Linux kernel daemon issues the

 

command to the virtual disk instead of to the driver IOCTL node. This action is not supported.

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H310, H710, H710P, H810 specifications

Dell offers a range of storage controller technologies, notably the H810, H710, H710P, and H310, which cater to different enterprise needs. These controllers are designed to support various storage configurations, enhancing overall system performance and reliability.

The Dell H810 is a high-performance PCIe 3.0 RAID controller that supports up to eight internal drives and is particularly suited for demanding workloads. It features advanced RAID levels including RAID 0, 1, 5, 6, 10, 50, and 60, providing flexibility for various data protection strategies. The H810 also supports up to 32TB of storage capacity, making it suitable for environments that require substantial data management capabilities.

The H710 is another powerful RAID controller, widely recognized for its balance of performance and cost-efficiency. It features 1GB of cache memory, which aids in accelerating read and write operations. The H710 supports the same RAID levels as the H810 and allows for up to 512MB of non-volatile memory. This ensures data integrity even in the event of a power failure, making it reliable for critical applications.

The H710P is an enhanced version of the H710, with a significant upgrade in its cache capabilities. It offers 2GB of battery-backed cache memory, further enhancing data processing speeds and improving responsiveness. The H710P is ideal for intensive workloads and virtualization, where rapid access to data is essential. This controller also includes features such as RAID storage pooling, intelligent data tiering, and support for multiple virtual disks.

Finally, the H310 is a cost-effective option for small to medium-sized businesses or those with less demanding storage requirements. It offers similar RAID support as the higher-end controllers but operates with a simpler architecture. The H310 features 512MB of cache, providing sufficient performance for regular workloads without the additional complexities of more advanced controllers.

In summary, Dell's H810, H710, H710P, and H310 storage controllers each serve distinct purposes, providing various features, technologies, and performance characteristics tailored to different business needs. From high-capacity storage solutions to user-friendly setups, Dell’s offerings ensure that organizations can efficiently manage their data storage requirements.
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